A few population jumps of C took place in China, where C is a small, but signifcant percentage of the population.
The rest of the C and D samples are mainly small branches of old remote areas. A few branches are:
D-M64.1: the first arriving population in Japan and is about 30-35 percent of the population. The oldest branch split is about 20.000 years ago. No descendants are known outside Japan. The oldest remains in Japan are from 30.000 years ago. The later arriving haplogroup C and O arrived about 3100 ybp. The original language that is related to the first arrival is the Ainu language, which is a language family isolate.
D-Y34637: Andamanese (island east of India). Two samples with the ONG-language are found in https://yfull.com/tree/D-Y35019/ , three samples with the Jarawa-language are also found in https://yfull.com/tree/D-Y34637/ . This means that contacts took place, but two distant languages were maintained. This was the case for both males and females. It probably means that, if a person went to the other island, the language was maintained on the island. The reported Y-DNA tmrca's are 4400 and 1050ybp, which is too short for the development of a new language. If we would somehow want the relation between Y-DNA and language lines to be maintained, we could suggest that the two branches who are on a distance of 4500 ybp made the two language lines, and one male person went from one island to the other, and joined the other group.
C-L1373: a large Mongolean-Chinese (+ north-west) branch. This branch (tmrca 16200ybp) is probably the ancestor branch of Mongolic, see also ,a href=https://www.nature.com/articles/s41431-019-0399-0>Balinova et al.
C-F1067: a large Chinese-Asian branch
C-M8: a small Chinese branch
C-F1640: a small Chinese branch
C-K98: a small south-west-Asian branch
C-Z31885: an old Austronesian branch (Papua-Australia); this branch is discussed in the MS branches, since its history is Melanesian
link to phylogenetic tree: D
link to phylogenetic tree: C
